Kouta Kazuraba works hard as a part-timer and he thinks that he would like to be a different person in the future. One day, he happened to pick up a Sengoku Driver, the tool for transforming into an Armored Rider, in the forest and started fighting as Armored Rider Gaim to save the people from the monsters named Inves, who came from a different world.

Gaku Sanoas Kota Kazuraba / Kamen Rider Gaim
Yutaka Kobayashias Kaito Kumon / Kamen Rider Baron
Mahiro Takasugias Mitsuzane Kureshima / Kamen Rider Ryugen
Yuki Kubotaas Takatora Kureshima / Kamen Rider Zangetsu
Yuumi Shidaas Mai Takatsukasa
Kanon Hanakageas Chucky
Ren Ozawaas Rat
Gen Urobuchi
Nobuhiro Mouri